Earth-excavator and embankment-builder



(No Model.) 2 Sheets-Sheet l.

M. J. MULVIH'IL'L & J. D. TINNEY. EARTH EXGAVATOR AND EMBANKMENT BUILDER.

Patented Mar,

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{No Model.)

V 2 Sheets-Sheet 2. M. J. MULVIHILL & J-. D. TINNEY. EARTH EXGAVATOR AND EMBANKMENT BUILDER, No; 295,128.

Patented Mar. 11, 1884;

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NI'IE STATES PATENT tries.

MICHAEL J. MULVIHILL, OF WAR-BEN COUNTY, AXD JOHN DAR-E TINNEY,

OF VICKSBURG, MISSISSIPPI.

EARTH-EXCAVATOR AND EMBANKMENT-BUlLDER.

SPECIFICATION forming part of Letters Patent No. 295,128, dated March 11, 1884.

To ail whom it may concern.-

Be itknown that we, Mionnnn J OSEPH MUL- vIHILL and JOHN DARE TINNEY,16SiCling, respectively, in the county of Warren and State of Mississi ppi, and at Vicksburg, in the county of Warren and State of Mississippi, have invented certain Improvements in Earth-Excavators and Embankment-Builders, of which the following is a specification.

In the drawings forming a part hereof, Figure I is a side elevation, partly in section, of the improved excavator. Fig. II isa plan of the same.

Similar letters of referene indicate similar parts in both views. A is the wheeled platform of the excavator, which is provided with a tongue or other means, (not shown in the drawings) whereby it may be moved from one place to another.

B is the central post of the crane resting at its lower end in a step, a, and at its upper end supported by a frame-work, C, the cross-piece only of which is shown in the drawings.

D is the jib of the crane, and E the shovelbeam, to which the shovel]? is attached. The under side of the shovel-beam E is provided with a rack, I), which rests on a spur-gear, G, secured to the shaft 0. The disengagement of the rack from the spur-gear G is prevented by a plate, d, supported from the shaft 0 in any suitable manner, and the plate d has a roller, 6, which bears against the upper side of the shovel-beam E. The reciprocating movement of the shovel-beam and shovel is effected as follows: A shaft, f, supported in bearings g, is fitted with a pulley, h, which is connected by a belt to an engine situated at any suitable plaoe on the platform A. This shaft f communicates motion to a counter-shaft, 2', through the medium of the miter-gears 7c and k. The shaft i, which is confined in bearings Z, has a feather where it passes through the miter-gear k, to admit of its having alongitudinal movement independently of the said miterrgear.

H H are friction-wheels secured to the shaft i,to give motion to a conical friction-drum, I, keyed to the shaft 0. It will be understood that as the countenshaft'i has a longitudinal movement, either one of the friction-wheels H E,which are fastened thereto, may be drawn (3S0 model.)

into contact with the friction-drum I. Consequently, the spur-gear,which is fastened to the shaft 0, can be made to revolve in either direclow ofthe longitudinal movement of theshovel- 6o beam in the various positions in which the crane may be placed, we provide the conical drum I with a number of faces at such angles that when any one of them is made to touch the wheels H H a proper contact is formed with the whole face of the said wheels. W'e do not limit ourselves to any, number of conical faces 011 the conical drum I, but provide as many as there are positions which the crane is'designed to occupy.

By referring to Fig. I, it will be seen that the shovel F is hinged to the end of the shovelbeam at; consequently the outer end of the said beam and the shovel are required to be supported by different chains or ropes. The possible angle of the shovelF with reference to the shovel-beam E may be limited to suit the degree of hardness of the earth to be excavated by means of an adjustable slotted stop plate, a, which is bolted only to the upper side ring toFig. II it will be seen that they lead to 8 5 hoistingdrums K and K. The chains or ropes for moving the jib of the crane to the right or left are represented by p and p, and they are attached to other winding-drums, L and L, in the rear of the ones K K. and L L receive th eir movement independently from a shaft, M, driven by means of a belt, 9 from a pulley, g, on the shaft f. The shaft M, which is constant] yin revolution, has two friction-wheels, N N, with which similar wheels, 0 and O and P and P, on the shafts or spindles of the hoisting-drums K K and L L, may be brought in contact. We do not show the levers and other devices which are employed to move the hoisting-drums to bring their fric- The drums K K 0 tion-wheels in contact with those on the shaft M, as it would tend to complicate the drawings, and they form no part of our invention.

The excavator is provided with a Windlass, (not shown in the drawings) whereby it may be drawn from place to place.

From the foregoing description it will be seen that by properly manipulating the various'shafts and hoistingdrums described, the shovel may be moved in any manner necessary to produce its proper operation in excavating; consequently the description of the digging or excavating operation is unnecessary herein.

\Ve claim as our invention+ 1. In an excavator and embankment-builder, the shaft thereof, and mechanism connecting it directly to the shovel-beam, which shaft has a circumferential motion in common with the crane, and is provided with a friction-drum having a series of frictional surfaces differing in angle of inclination, combined with a pair of friction-wheels on a shaft, and susceptible of movement to and from the surface of the said drum, and means to effect thesaid movement of the friction-wheels, substantially as and for the purpose specified.

shovel-beam supported from the said jib, and

adapted ,for elevation and depression, combined with a shovel hinged to the outer end of the said shovel-beam, and connected by an independent rope or chain to the said j ib, whereby it may be emptied of its contents without affecting the position of the said beam, substantially as specified.

3. In an excavator and embankmentbuilder, a shovel-bea1n and shovel hinged together and supported independently by ropes or chains, combined with an adjustable stop secured only to the said shovelbeam, and adapted to be projected and held at various distances beyond the end thereof, to limit the possible angle of the said shovel with reference to its beam when the former is elevated, substantially as specified.

M. J. MU'LVIHILL. JOHN DARE TINNEY. 

